Freezer paper (available from hobbycraft, ebay..) Sheet of A4 card (I use 200gsm) Masking tape Plain fabric Lightweight interfacing Design of your choice A printer (any of today's printers will do the job)
Firstly you need to be aware of which was your printer loads the paper. Mine is a bottom feeder, so I need to make sure my paper is the wrong way up before I print. As it turns right way round while printing! Do a test print before printing on your fabric to be sure you know which way up you need to be!
Cut a piece of freezer paper to A4 size. You can buy pre-cut freezer paper from some stores to save time. Take your fabric and cut it roughly to size and interface it. This will add strength as it runs through the printer.
Iron the freezer paper to the back of your fabric using a warm iron and press until it's well stuck. Place the whole thing onto some card and trim to size so it fits snuggly to the A4 card.
Take a few strips of masking tape and tape around the edges making sure it's completely flat. Overturn the edge so it's stuck on both sides of the card. This will add strength and help the whole thing run along the printers rollers.
Now take your design you'd like to see printed and adjust it as you need to. I use Craft Artist 2 and Abode Photoshop when working with graphics.
Be sure that the fabric is facing the right way up for your printer and print using plain paper on the best setting your printer as to offer.
Don't use photo paper or glossy paper as on mine it releases too much ink. Plain paper gives a much better print, but feel free to experiment with this on scrap fabric.